Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5CFK callsign genealogy
Currently held by Vargas, Guillermo A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W5CFK's current licensee, walking backwards.
- Vargas, Guillermo ATXgranted 2012-09-14cancelled 2017-04-28
Successor callsigns
Callsigns held now by people who previously held W5CFK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5CFK, oldest first.
- PHARES, CHARLES C TX1996-06-04 → cancelled 2008-06-05
- Vargas, Guillermo A TX2017-04-28 active